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Nickel manganese composite hydroxide, production method for nickel manganese composite hydroxide, positive electrode active material for non-aqueous electrolyte secondary battery, production method for positive electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

a nickel manganese and composite hydroxide technology, applied in the field of nickel manganese composite hydroxide, can solve the problems of low fillability of active materials, low volume energy density, and inferior capacity of lithium-nickel composite oxide-based ones, and achieve excellent output characteristics, high energy density, and high industrial value.

Active Publication Date: 2019-09-26
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention solves problems in achieving both high energy density and excellent output characteristics in nonaqueous electrolyte secondary batteries. This is achieved by using a nickel-manganese composite hydroxide as a precursor for a positive electrode active material. The method of production described in the invention is easy to implement and can be done on an industrial scale, making it of great value.

Problems solved by technology

However, it is inferior to lithium-nickel composite oxide-based ones in capacity, and its capacity (energy density) is required to be improved.
Such an active material causes an electrochemical reaction to uniformly occur and has the advantages of high capacity and long life, but on the other hand, it is low in fillability of the active material and is thus not high in volume energy density.
However, a process of pulverizing the obtained hydroxide and then again granulating it to obtain a precursor is required, which is a problem in productivity.
However, although battery capacity is studied, other battery characteristics have not been fully studied.
However, this presentation focuses only on fillability improved by the circularity of the particles and does not study output characteristics.

Method used

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  • Nickel manganese composite hydroxide, production method for nickel manganese composite hydroxide, positive electrode active material for non-aqueous electrolyte secondary battery, production method for positive electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
  • Nickel manganese composite hydroxide, production method for nickel manganese composite hydroxide, positive electrode active material for non-aqueous electrolyte secondary battery, production method for positive electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
  • Nickel manganese composite hydroxide, production method for nickel manganese composite hydroxide, positive electrode active material for non-aqueous electrolyte secondary battery, production method for positive electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

Examples

Experimental program
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Effect test

example 1

[0117][Production of Composite Hydroxide]

[0118]A prescribed amount of pure water was put into a reaction tank (60 L), and stirring power was adjusted to 5.5 kW / m3. Next, the temperature (liquid temperature) in the reaction tank was set to 45° C. while stirring. In this process, a nitrogen gas (N2) was supplied to the reaction tank, and a N2 flow rate was adjusted so as to give a dissolved oxygen concentration in the liquid in the reaction tank of 5.8 mg / L. Simultaneously and continuously added to this reaction tank were a 2.0 mol / L mixed aqueous solution dissolving nickel sulfate, cobalt sulfate, and manganese sulfate so as to give a molar ratio among nickel:cobalt:manganese of 35:35:30, a 25% by mass aqueous sodium hydroxide solution as an alkali solution, and a 25% by mass ammonia water as a complexing agent to perform a neutralization crystallization reaction. A pH value and an ammonium ion concentration were adjusted so as to give a dissolved nickel concentration of 410 mg / L. In...

example 2

[0131]A nickel-manganese composite hydroxide and a positive electrode active material were produced similarly to Example 1 except that the N2 flow rate was adjusted so as to give a dissolved oxygen concentration in the crystallization process of 5.0 mg / L. Table 1 lists characteristics of the obtained nickel-manganese composite hydroxide. Table 2 lists characteristics and electrochemical characteristic evaluation results of the obtained positive electrode active material. The evaluations were performed similarly to those in Example 1.

example 3

[0132]A nickel-manganese composite hydroxide and a positive electrode active material were produced similarly to Example 1 except that the N2 flow rate was adjusted so as to give a dissolved oxygen concentration in the crystallization process of 5.0 mg / L and that the ammonium ion concentration was controlled so as to give a dissolved nickel concentration in the reaction aqueous solution of 600 mg / L. Table 1 lists characteristics of the obtained nickel-manganese composite hydroxide. Table 2 lists characteristics and electrochemical characteristic evaluation results of the obtained positive electrode active material. The evaluations were performed similarly to those in Example 1.

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Abstract

Provided are a positive electrode active material that can provide a nonaqueous electrolyte secondary battery having high energy density and excellent output characteristics, a nickel-manganese composite hydroxide as a precursor thereof, and methods for producing these. A nickel-manganese composite hydroxide is represented by General Formula (1): NixMnyMz(OH)2+α and contains a secondary particle formed of a plurality of flocculated primary particles. The nickel-manganese composite hydroxide has a half width of a diffraction peak of a (001) plane of at least 0.35° and up to 0.50° and has a degree of sparsity / density represented by [(a void area within the secondary particle / a cross section of the secondary particle)×100](%) within a range of greater than 10% and up to 25%.

Description

TECHNICAL FIELD[0001]The present invention relates to a nickel-manganese composite hydroxide, a method for producing the same, a positive electrode active material for a nonaqueous electrolyte secondary battery, a method for producing the same, and a nonaqueous electrolyte secondary battery.BACKGROUND ART[0002]In recent years, with the proliferation of portable electronic equipment such as cellular phones and notebook personal computers, development of a nonaqueous electrolyte secondary battery with reduced size and weight having high energy density is intensely demanded. A representative example of such a nonaqueous electrolyte secondary battery is a lithium ion secondary battery. For a negative electrode active material of the lithium ion secondary battery, lithium metal, lithium alloys, metal oxides, carbon, and the like are being used. These materials are materials that can de-insert and insert lithium.[0003]Currently, research and development of lithium ion secondary batteries ...

Claims

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Application Information

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IPC IPC(8): H01M4/505C01G53/00H01M4/525H01M10/0525
CPCH01M2004/028C01P2006/11C01P2006/14H01M4/505H01M4/525C01P2006/40C01P2002/74C01P2006/12C01P2004/50C01G53/006C01P2002/52H01M10/0525C01P2004/51C01P2004/03C01P2004/32C01P2004/61C01G53/50C01P2006/19C01P2004/20H01M4/131Y02E60/10C01G53/44H01M2300/0017C01G53/04
Inventor KANEDA, HARUKIKOSHIKA, YUKIANDO, TAKAAKI
Owner SUMITOMO METAL MINING CO LTD
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